I agree, that local disputes and misunderstandings happen. But for having an open border like the European Union, such incidences are scarce, i.e., between 2010-2020, only 2 such incidences took place.
For example -
Expressing serious concern over Indian security forces’ entry into the Nepali territory on Sunday, the Ministry of Foreign Affairs on Monday said that it has urged the Indian authorities to make such incidents are not repeated in future.
kathmandupost.com
Deputy Prime Minister and Home Minister Bimalendra Nidhi has said the government has declared Govinda Gautam as a martyr. Gautam was killed in an alleged firing by India’s Seema Sashastra Bal (SSB) in Punarbas of Kanchanpur on Thursday.
kathmandupost.com
You will always find a different narrative when asked by the concerning party.
If you use brute force to tame and discipline everyone, your subjects will hate and despise you. Any country (be it Nepal or Bhutan) doesn't want to be reminded it is weak and helpless in front of a big bully, everyone has self-respect and wants to be treated as equal.
We should not follow the footpath of China.